212222310320221 has 4 divisors (see below), whose sum is σ = 212222493603232. Its totient is φ = 212222127037212.

The previous prime is 212222310320191. The next prime is 212222310320287. The reversal of 212222310320221 is 122023013222212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212222310320221 - 2³⁵ = 212187950581853 is a prime.

It is a super-2 number, since 2×212222310320221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222310390221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89893551 + ... + 92224156.

It is an arithmetic number, because the mean of its divisors is an integer number (53055623400808).

Almost surely, 2^{212222310320221} is an apocalyptic number.

It is an amenable number.

212222310320221 is a deficient number, since it is larger than the sum of its proper divisors (183283011).

212222310320221 is a wasteful number, since it uses less digits than its factorization.

212222310320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183283010.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 212222310320221 its reverse (122023013222212), we get a palindrome (334245323542433).

The spelling of 212222310320221 in words is "two hundred twelve trillion, two hundred twenty-two billion, three hundred ten million, three hundred twenty thousand, two hundred twenty-one".